A sweet ass addon pack for Red Dead Redemption to be released on Oct. 26th for PS3 and Xbox 360, it features the four horses of the apocalypse, zombie classes, like bruisers, and a L4D like spitter, and... zombie wildlife and you won't believe this, but sasquatch, John Marstons wife as an exorcist like creature, you play as an un-zombiefied Marston who has to find a cure. Get it if you have RDR

Me: Hey man, did you hear Undead Nightmare is out today?
Friend: Really? When we get home, we should buy and download it, then we can save the town of Blackwater from zombies!!
Me: A'ight, lets go!